/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.myfaces.examples.listexample;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class PagedSortableCarList extends SortableList
{
    private List cars = new ArrayList();

    private Map carMap = new HashMap();

    public PagedSortableCarList()
    {
        super("type");
        for (int i = 100; i < 900; i++)
        {
            Object car = new SimpleCar(i, "Car Type " + i,
                    (i % 2 == 0) ? "blue" : "green");
            cars.add(car);
            carMap.put(new Integer(i), car);
        }
    }

    public List getCars()
    {
        sort(getSort(), isAscending());
        return cars;
    }

    public void setCars(List cars)
    {
        // update the cars from the provided list
        for (Iterator iter = cars.iterator(); iter.hasNext();)
        {
            SimpleCar car = (SimpleCar) iter.next();
            SimpleCar oldCar = (SimpleCar) carMap.get(new Integer(car.getId()));
            oldCar.setType(car.getType());
            oldCar.setColor(car.getColor());
        }
    }

    protected boolean isDefaultAscending(String sortColumn)
    {
        return true;
    }

    protected void sort(final String column, final boolean ascending)
    {
        Comparator comparator = new Comparator()
        {
            public int compare(Object o1, Object o2)
            {
                SimpleCar c1 = (SimpleCar) o1;
                SimpleCar c2 = (SimpleCar) o2;
                if (column == null)
                {
                    return 0;
                }
                if (column.equals("type"))
                {
                    return ascending ? c1.getType().compareTo(c2.getType())
                            : c2.getType().compareTo(c1.getType());
                }
                else if (column.equals("color"))
                {
                    return ascending ? c1.getColor().compareTo(c2.getColor())
                            : c2.getColor().compareTo(c1.getColor());
                }
                else
                    return 0;
            }
        };
        Collections.sort(cars, comparator);
    }
}
